termMapping

Hi Joao M S Silva

This is a disembodied properties list (DPL) for mapping current data from the relevant terminals. You can refer to appendix B in $CDSHOME/doc/cdfuser/cdfuser.pdf for more details. Alternatively, open up cdnshelp using "$CDSHOME/tools/bin/cdnshelp &" cmd and search for "accessing subcircuit simulation data".

It means that terminal D in the model files is mapped to pin d in the symbol. The first item is usually "nil" because it is a DPL. The comma (,) is the instance terminal delimiter.

Best regards
Quek

Thanks Quek.

Quek said:

It means that terminal D in the model files is mapped to pin d in the symbol. The first item is usually "nil" because it is a DPL. The comma (,) is the instance terminal delimiter.

But the symbol has pin cdsTerm("D"). Why is it mapped to "d"?

And how do I know that a comma must be used? Sometimes a : is used.

Hi João M. S. Silva

Hspice netlist is usually created in lowercase and so lowercase should be used in termMapping field too. You can refer to COS solution 1815106 for more details. Spectre termMapping uses colon. HspiceD uses comma.


Best regards
Quek

Hi Quek,

Thanks.

Maybe I was confusing termMapping with propMapping. In propMapping, (nil A B) means A=<value(B)> will appear in the netlist, right?

But in termMapping, (nil A B) means terminal A will appear as simulator's terminal B, is that it?

In HSPICE, \,d is the drain terminal, so we map it to cdsTerm("D") with (nil D \,d).

It seems like propMapping and termMapping order logic is different: in propMapping the first refers to the netlist and the second to the database, while in termMapping the first refers to the database and the second to the netlist.

Hi João M. S. Silva

Actually it is the opposite. "D" is the drain terminal which is mapped to the pin "D" in the symbol. Lowercase is usually used so pin "D" is written as "d". You can refer to the spectre termMapping example in cdfuser. I think it will clear things up. : )


Best regards
Quek

Hi Quek,

Yes, with the help of Jean-Baptiste Lasherme I realized this is not only used for netlisting but for result analysis.

It is all clear now, I hope :)

Thanks and best regards,

João M. S. Silva